urathane rubber

just want to know if anyone can tell me how to simulate urathane rubber for skteboard wheels.thanks
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You’re gonna put the camera that close to the wheels?

Raise the transparency really high (not alpha, but transparency). They reflect light softly, so use a low hardness value. Using ramp shaders will help if you know how to use them.

Transparency & reflection??:

http://funkyorange.com/kevin/stuff/skateboard%20009.jpg

If those are polyurethane rubber, I would use a lambert shader with no specularity. I think subsurface scattering is ideal for this - it gives a waxy effect but it’s difficult to do in Blender and isn’t really necessary here. Just make sure the wheels have rounded edges.